v4l2:fluster: Merge fluster_parser.py call

This patch allows rendering proper fluster_parser.py call from the Test
Action template. Currently the output TestJob definition has a following
step:

   - "./ssh_retry.sh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null\
     \ -i /home/cros/.ssh/id_rsa root@$(lava-target-ip) python3 /usr/bin/fluster_parser.py\
     \ -ts AV1-TEST-VECTORS -d GStreamer-AV1-V4L2SL-Gst1.0 \n             \
     \ -t 90 -j 1"

(note '\n' in the second to last line) which results in ignoring timeout
and number of parallel jobs arguments when the command is executed.

Signed-off-by: Paweł Wieczorek <[email protected]>

config/runtime/tests/fluster-chromeos.jinja2

@@ -43,8 +43,7 @@
               -o UserKnownHostsFile=/dev/null
               -i /home/cros/.ssh/id_rsa
               root@$(lava-target-ip)
-              python3 /usr/bin/fluster_parser.py {{ testsuite_arg }} {{ decoders_arg }} 
-                            {{ videodec_timeout_arg }} {{ videodec_parallel_jobs_arg }}
+              python3 /usr/bin/fluster_parser.py {{ testsuite_arg }} {{ decoders_arg }} {{ videodec_timeout_arg }} {{ videodec_parallel_jobs_arg }}
             - lava-test-set start get_results
             - mkdir -p /opt/fluster/
             - >-